Production of Reactive Oxygen Species (ROS) by Various Marine Fish Species during the Larval Stage

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  • KADOMURA Kazushi
    Nagasaki Prefectural Institute of Fisheries Graduate School of Science and Technology, Nagasaki University
  • NARUSE Sayaka
    Division of Biochemistry, Faculty of Fisheries, Nagasaki University
  • SUGIHARA Shin
    Division of Biochemistry, Faculty of Fisheries, Nagasaki University
  • YAMAGUCHI Kenichi
    Graduate School of Science and Technology, Nagasaki University Division of Biochemistry, Faculty of Fisheries, Nagasaki University
  • ODA Tatsuya
    Graduate School of Science and Technology, Nagasaki University Division of Biochemistry, Faculty of Fisheries, Nagasaki University

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Previous studies have indicated that the devil stinger produces reactive oxygen species (ROS) during early development from fertilized egg to larva. To determine whether ROS generation is a common feature in marine fish species, we conducted chemiluminescence analysis using ROS specific probe (L012) on larvae of six marine fish species. Marbled rockfish, black rockfish, and devil stinger showed higher levels of chemiluminescence response (CR), whereas the levels of CR of sevenband grouper, tiger puffer, and red seabream were fairly lower. These CRs were inhibited by the addition of superoxide dismutase. Hypersensitive photon-counting microscopic observation of black rockfish suggested that ROS production was concentrated in the head area. Our results suggest that the larvae of these six marine fishes produce ROS to considerably different extents depending on species, and that rockfish species, belonging to ovoviviparous fish, tend to produce much higher levels of ROS especially at the later larval stage.

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